fix: doc updates

Author: usefulthink

README.md

@@ -28,7 +28,7 @@ script.
 
 ## Installation
 
-Install the [`@googlemaps/js-api-loader` NPM package][npm-pkg] with:
+Install [`@googlemaps/js-api-loader`][npm-pkg] with:
 
 ```sh
 npm install --save @googlemaps/js-api-loader
@@ -40,8 +40,6 @@ yarn add @googlemaps/js-api-loader
 pnpm add @googlemaps/js-api-loader
 ```
 
-### TypeScript
-
 TypeScript users should additionally install the types for the Google Maps
 JavaScript API:
 

src/index.ts

@@ -143,4 +143,6 @@ function installImportLibrary_(options: APIOptions) {
   if (!importLibraryExists) bootstrap(options);
 }
 
+// export the deprecated (and non-functional) Loader class to trigger a strong
+// error-message for users migrating to the new version
 export * from "./deprecated.js";